The most interesting fact that you know and I don't, but I should?

The ancient Egyptians used mouldy bread on infected wounds and cuts in order to treat some patients, and no one understood why.

Until the year 1928, five thousand years later, modern science arrived if it was discovered by the scientist Alexander Fleming that penicillin had a great effect as an antibiotic on bacteria.

What is the relationship of bread to the subject?

When bread is left rot, it secretes a fungus called Penicillium, from which penicillin is derived, the most famous antibiotic used so far to treat bacteria known to the Egyptians 5,000 years ago.